I'm having problems using LastPass in a web page because everytime I reload the page, the internal boxes field names, where data and password are entered, change.

I know that LastPass use the internal name of each box for saving data, so every time we access a site, it checks all names and fill properly the boxes. But if internal names are generated randomly, LastPass doesn't know what to do, because there is no correspondence between previous saved names and the new ones. The result is empty fields.